[Bug 101517] [BAT][BYT,BSW] WARN_ON(dev_priv->uncore.funcs.mmio_readl(dev_priv, (((const i915_reg_t){ .reg = (0x180000 + 0x650C) })), true) & (1 << 27))

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101517

krisman at collabora.co.uk changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|intel-gfx-bugs at lists.freede |krisman at collabora.co.uk
                   |sktop.org                   |

--- Comment #8 from krisman at collabora.co.uk ---
(In reply to Martin Peres from comment #5)

> > The simple solution would be to just revert commit 63ff30442519 ("drm/i915:
> > Nuke the VLV/CHV PFI programming power domain workaround")
> > 
> > I failed to consider that the firmware likes to reset the cdclk to some
> > non-minimum frequency during suspend, and then we apparently perform a
> > modeset without actually modesetting anything and thus only end up
> > reprogramming the cdclk without the power well being enabled.
> 
> Let's do it then! Revert fast, rework carefully.

Submitted to the ML:
https://lists.freedesktop.org/archives/intel-gfx/2017-June/131672.html

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